Multimedia hard drives well designed, easy hard drive installation, easy formatting the internal hard disk (4TB) at Grace Firmware Network file transfer through FTP server Easy Flat minor: no direct transfer of Usb3 or eSATA port by Pc or Mac file when the disk is formatted for use, it is no longer recognized (hard disk> 2 to) Be careful not to update firmware and set once installed files, disk formatting is included ... you will reload everything in the record ... Very good quality of HD and 3D HD files